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Toyota Sienna Service Manual: How to proceed with troubleshooting

Toyota Sienna Service Manual / Engine / 2Gr-fe engine control system / Sfi system / How to proceed with troubleshooting

HINT:

The intelligent tester can be used in steps 2, 3, 4, 6 and 9.

1 VEHICLE BROUGHT TO WORKSHOP

2 CONNECT INTELLIGENT TESTER TO DLC3

HINT:

If the display indicates a communication fault in the tester, inspect the DLC3.

3 CHECK DTC AND FREEZE FRAME DATA

(a) Check for DTC(s) and freeze frame data (See page ES- 40).

HINT:

Record or print the DTCs and freeze frame data, if necessary.

4 CLEAR DTC AND FREEZE FRAME DATA

(a) Clear the DTC(s) and freeze frame data (See page ES- 40).

5 CONDUCT VISUAL INSPECTION

6 SET CHECK MODE DIAGNOSIS

(a) Set the check mode (See page ES-43).

7 CONFIRM PROBLEM SYMPTOMS

HINT:

If the engine does not start, perform steps 9 and 11 first.

Result

8 SIMULATE SYMPTOMS

9 CHECK FOR DTCS

(a) Check for DTCs (See page ES-39).

Result

10 REFER TO DTC CHART

HINT:

Refer to the DTC chart (See page ES-56).

GO TO STEP 13

11 CONDUCT BASIC INSPECTION

HINT:

Refer to "BASIC INSPECTION" (See page ES-13).

Result

12 REFER TO PROBLEM SYMPTOMS TABLE

HINT:

Refer to "PROBLEM SYMPTOMS TABLE" (See page ES- 27).

Result

13 CHECK ECM POWER SOURCE CIRCUIT

HINT:

Refer to "ECM POWER SOURCE CIRCUIT" (See page ES- 437).

14 CONDUCT CIRCUIT INSPECTION

Result

15 CHECK FOR INTERMITTENT PROBLEMS

HINT:

Refer to "CHECK FOR INTERMITTENT PROBLEMS" (See page ES-13).

GO TO STEP 17

16 CONDUCT PARTS INSPECTION

17 IDENTIFY PROBLEM

18 ADJUST AND/OR REPAIR

19 CONDUCT CONFIRMATION TEST

END

System diagram
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Check for intermittent problems
1. CHECK FOR INTERMITTENT PROBLEMS HINT: For use of the intelligent tester only: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an intelligent teste ...

Other materials:

Terminals of ECU
1. CHECK POWER BACK DOOR ECU Disconnect the P13 and P14 ECU connectors, and check the voltage and resistance of each terminal of the wire harness side connectors If the result is not as specified, there may be a malfunction on the wire harness side.  Reconnect the ECU co ...

On-vehicle inspection
1. CONNECT INTELLIGENT TESTER (a) Connect the intelligent tester to the DLC3. (b) Start the engine and run at idle. (c) Select the ACTIVE TEST mode on the intelligent tester. HINT: Please refer to the intelligent tester operator's manual for further details. 2. INSPECT ACTUATOR MOTOR ...

Communication Error from ECM to VSC
DTC P1631 Communication Error from ECM to VSC DTC U0100 Lost Communication with ECM/PCM "A" DESCRIPTION The ECM sends signals such as A/T information signals, dynamic laser cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the sk ...

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